While decorating the house, you buy things that are meant to be hanged. You can use nails to hang them, but that will damage your precious wall. And if you ever change your mind to remove that piece of art, holes on the wall will remain until you fill it up with other pieces. That may not go with the wall color, or this will be time and cost consuming. But you will always have that option to hang your precious things, without damaging your wall. You can use the suction cup.

You may have seen Suction Cup Hooks in the market. It is basically made out of rubber materials, and there is little science behind it. This elastic and flexible item use particle vacuum to be stuck on the wall. The idea of suction came from some animals and fishes, like...